00688naa#a2200193#i#450# EN\\bibl\47720 20241122025732.5 2073-5529 20211215b2021####ek#y0engy0150####ca RU Characteristics of perch fish diet in small lake of Lake Onega catchment area Journal article Astrakhan Astrakhan State Technical University 2021 6 с. Journal article local Рыбное хозяйство. Рыболовство. Рыбоводство. 6392 Georgiev Andrey Pavlovich Legun Anna Grigorievna Pogosyan Valeria Rubenovna vestnik.astu.org